Safety-valve for water-tube boilers



7 J. ST-ASINSKI.

SAFETY VALVE FOR WATER TUBE BOILERS.

APPLICATlON FILED FEB. I5, 1919.

Patented Oct. 26, 1920.

2 SHEETSSHEET I.

L STASINSKI.

- SAFETY VALVE FOR WATER TUBE BOILERS.

on 9 .m Rm F. F. D E L F N 0 T A C IL P P A 0.. 92 n 6 03. mm m d2 W n wa P 6 .3 8

gnve nfoz JOSEPH Smsmsm W afl'oznu uNiTun star JOSEPH s'rAsI sKI, orPHILADELPHIA, PENNSYLVANIA.

SAFETY-VALV non WATER-TUBE BOILERS.

Specification of Letters Patent. Patented Oct. 26, 1920.

Application filed February 15, 1919. Serial No. 277,185.

Tater-Tube Boilers, of which the following is a specification.

My invention consists of a special form of valve intended to prevent theescape of steam or water, under pressure, from the tube structure of awater tube boiler in case of leakage or like defect in the tubestruction ture of such a boiler.

in the accom- Fig. 2 is a horizontal sectional view, on a larger scale,of the valve structure constituting the subject of my invention; 7

Fig. 3 is a view, partly in side elevation and partly in verticalsection, showing said valve structure in open relation to thepipe withwhich it cooperates, and

Fig. 4 is a view similar to Fig. 3, but showing the valve in closedrelation to said pipe. 111 Fig. 1 of the drawing, 1 represents the watertube structure of the boiler, 2 the opposite headers of the same, 3 thesteam drum, 4 a pipe or nipple connecting said steam drum with the rearheader of said tube structure, and 5 the pipe connecting said steam drumwith the forward header of the tube structure, all of these parts beingcommon to water tube boilers as now constructed.

nism have been devised for closing communication between the tubestructure and the steam drum when the pressure in the tube structurehas, by reason of leakage, been reduced below that in the drum, and myinvention comprises a special form of valve mechanism for this purpose.

The valve is shown as applied to the upper end of the pipe or nipple iwhich extends from the rear header 2 of the tube .structure to the steamdrum 3, the upper endof said pipe projecting into the drum and constitutm theseat forthe valve. 1

Fearing upon thein'ne-r side of theshell of thedrum 3 is a plate 6 whichis secured in place by the same nut 7 which secures the pipe 4 on theinside of the drum, said plate having radiating wings 6 from each ofwhich projects upwardly apost 8 whereby said posts can be secured intheir proper position within the drum without the necessity of formingopenings in the shell of the latter for their reception.

A valve 9, whichcooperates with-the valve seat at the inner end of thepipe 4 has wings 10, each of which has at its outer end a sleeve 1Osurrounding one of the'posts 8, the valve being thereby guidedin itsvertical move ments and saidiposts' also serving to aid the usual.projecting guide fingers on the valve in preventing lateral displacementof said valve in respect to the valve seat.

Any desired yielding means may be em ployed for the purpose of normallymain-- taining the'valve in equilibrium above the valveseat' and in openrelation thereto, the means which I illustratebeing as follows:Surrounding each post 8 above and below the wingslOare spiralsprings 11which tend to maintain the valve in proper position, as shown'in Fig. 3,but as soon as there is any reduction in pressure within the pipe 4,dueto leakage from the tube structure or other cause the valve 9 will bedrawn down to its seat on the inner end of the pipe, as shown in Fig.4-, and will prevent further escape of steam or water into said pipefrom the drum 3, the valve remaining in this closed position as long asthe cause continues. The wings of the valve are stifienedfby ribs 10 onthe backs of the same, and the posts 8 are threaded at their upper endsfor the reception of nuts 12, by the adjustment of which the tension ofthe springs 11 ca be regulated, as may be desired.

The valve9 has, projecting from the back of the same, a central stud 13whereby it may be secured in the chuck of a lathe used for truing up theface of the valve which contacts with the seat.

While I prefer to secure the plate 6'to the shell of the drum by thesame nut which secures the pipe d thereto this is not essential to themain feature of my invention, which'consists in making the post carryingplate 6 separate from the shell of the drum '3 and from the valve seat,so as to render unnecessary the formation of openlngs 1n sald shell forsecurlng the posts 1n position therein and also for renderingunnecessary the increase in size of the valve seat to cor respond withthe length of the guide arms on the valve, and while I also prefer todispose the springs 11 so as to surround the' posts 8 said springs maybe otherwise disposed,- if desired, and the springsabove the wings 10may also be dispensed with when it is not desired to holdithe open valvein equilibrium above itsiseat.

qwith said pipe, a valve adapted to close against saidscat when thepressure within pipe connecting said drum With one of the" headers ofthe tube structure, avalve seat on the inside of the drum communicatingthe drumexceeds that in the tube structure or its connections, guidewings projecting from said valve, a plate separate from the shell of thedrum but disposed within the same, saidplate having inwardly projectingposts which serve as guides for the projecting wings of the valve, andyielding means for normally retaining sald valve in open're-' latlon to1ts seat.

2. The-combination of the tube structure and steam drum of a Water tubeboiler, a pipe connecting said drum with one of the headers of the tubestructure and projecting the drum communicating with said pipe, a valveadapted to. said seat,a plate disposed Within the drum andhavinginwardly projecting;valve-guiding. posts, and a nut applied to'theinwardly projecting portionof said pipe andservingto confine both andplaterto the shell ofthedrum. V

3. The combination of the tube structureandsteam drum of a water tubeboiler, a'

, into said drum, a valve seat on the inside of V pipe connectingsaid"drum withlone of the e headers of the tube structure, a valve seat onthe inside of the drum communicating with said pipe, a plate disposedwithin the drum and-having lnwardly projecting posts, and a valveadapted toclose upon said seat,'said valve having guide members engagingsaid posts-and also having, on its back, a-ccntral pro ecting stud; i

In testimony; WhGI'BOf I- have signed my name to this specification.

I JOSEPH 'sT sI 's'KI.

